Denver is a consolidated city-county, meaning all permitting and zoning authority is centralized under the City and County of Denver. There are no independent municipalities within the county boundaries, and all development must comply with the Denver Zoning Code and specific overlay districts such as the Landmark Preservation or floodplain requirements.
How this fits with the state
The state authority here is Colorado DORA - State Electrical Board and State Plumbing Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.